diff --git a/man/kernel-command-line.xml b/man/kernel-command-line.xml
index cc267a3ecc..abe68e5496 100644
--- a/man/kernel-command-line.xml
+++ b/man/kernel-command-line.xml
@@ -123,6 +123,7 @@
                         </varlistentry>
 
                         <varlistentry>
+                                <term><varname>-b</varname></term>
                                 <term><varname>emergency</varname></term>
                                 <term><varname>single</varname></term>
                                 <term><varname>s</varname></term>
diff --git a/man/systemd.xml b/man/systemd.xml
index fe6e331f25..85c06d3866 100644
--- a/man/systemd.xml
+++ b/man/systemd.xml
@@ -1149,6 +1149,7 @@
                         </varlistentry>
 
                         <varlistentry>
+                                <term><varname>-b</varname></term>
                                 <term><varname>emergency</varname></term>
 
                                 <listitem><para>Boot into emergency